Refers to the small size of this species in relation to other Chromaphyosemion sp.

Agnèse, J.-F., L. Chirio, O. Legros, R. Oslisly & H.M. Bhé. 2018.

Unexpected Discovery of six new species of Aphyosemion (Cyprinodontiformes, Aplocheilidae) in the Wonga-Wongué Presidential Reserve in Gabon.

European Journal of Taxonomy, 471: 13, figs. 4E-H.

Males 3·5 cm, females smaller.

Chromaphyosemion

alpha

Populations

• Okoyo river (bridge)
• Pembé river (bridge)

Okoyo River, Northern Gabon.

Okoyo and Pembé drainages. First description paper states they have only been collected in 2 locations.
Replaced to the north by A.barakoniense & east by A.aurantiacum.

Small rivers (not found in middle areas) & muddy streams less than 1 metre wide.
Sympatric species - an unknown Aphyosemion, two unknown Epiplatys & a species of Plataplochilus.

Anal fin - from body a clear band followed by a thick red/orange band. This is followed by another clear band. Submarginal dark band with a thin yellow outer margin. Red/orange tip to dorsal fin which extends down the centre of this fin.
An alpha-shaped mark in males on pre- and postopercular region.

Collected at Pembé (bridge), 1st March 2016 by Laurent Chirio.

Clean, clear water is required.